A Low-Voltage High PSRR and High Precision CMOS Bandgap Reference

Zhou Qianneng (Chongqing University of Posts and Telecommunications)
Xue Rong (Chongqing University of Posts and Telecommunications)
Li Hongjuan (Chongqing University of Posts and Telecommunications)
Lin Jinzhao (Chongqing University of Posts and Telecommunications)
Li Qi (Chongqing University of Posts and Telecommunications)
Pang Yu (Chongqing University of Posts and Telecommunications)
Li Guoquan (Chongqing University of Posts and Telecommunications)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 12, No 5: May 2014

By adopting the technique of pre-regulator, a high PSRR and low temperature coefficient piecewise-linear bandgap reference (BGR) is designed for analog and mixed-signal application in this paper. The piecewise-linear BGR with pre-regulator, which is analyzed and simulated in SMIC 0.18μm CMOS process, has simple circuit architecture. Simulation results show that piecewise-linear BGR with pre-regulator achieves power supply rejection ratio (PSRR) of -102.488dB and -99.73dB, -82.983dB at 10Hz, 100Hz and 1kHz respectively. Piecewise-linear BGR with pre-regulator achieves the temperature coefficient of 2.235 ppm/°C when temperature is in the range from -50°C to 115°C. When power supply voltage VDD changing from 1.2V to 10V, output voltage deviation of piecewise-linear BGR with pre-regulator is only 0.2765mV, but output voltage of piecewise-linear BGR without pre-regulator has a deviation of 38.08mV. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4056